>> that is the one thing we have eliminated, david, is the idea it was a fat finger, an errant trade of some sort. i don't think it could have been. everything else is possible. the combination of factors, i have heard all of these traitors, all of them have different theories about what happened. here is a crazy one, soybeans, some people got short soybeans, long soybeans, had to get out, had to sell oil, set things off. and then you had a very small, very illiquid market and eventually stocks got triggered, people that weren't even there started selling and there was nobody there to pick up the other side of that, that was my best guess. not one specific one. cheryl: that is very true. the domino effect and give us a sense of what happened to oil.